Filter Control for GA Data Srouces

I am looking to create a Filter Control that allows the user to Filter between the connected data sources and letting that change the Data Source connected to each visualization. I can't seem to find anything about this on the web and feel like its an advanced request. The reason we need to do this is because previously to our team creation, someone else created multiple different accounts for the same client, leveraging different UA codes. In order to view all 3 Business Units under a single dashboard we need be able to filter by data source.